Joey,
I agree with Vincente that this should be mentioned, though
I disagree that this is a bug. I understand this effect of
freopen() to be pretty much standard Unix. Note that
SUSv3:stderr says:
The following symbolic values in <unistd.h> define the
file descriptors that shall be associated with the
C-language stdin, stdout, and stderr when the application
is started:
STDIN_FILENO
Standard input value, stdin. Its value is 0.
STDOUT_FILENO
Standard output value, stdout. Its value is 1.
STDERR_FILENO
Standard error value, stderr. Its value is 2.
Note the words "when the application is started". I have
changed this manual page text to read:
On program startup, the integer file descriptors asso‐
ciated with the streams stdin, stdout, and stderr are
0, 1, and 2, respectively. The preprocessor symbols
STDIN_FILENO, STDOUT_FILENO, and STDERR_FILENO are
defined with these values in <unistd.h>. (Applying
freopen(3) to one of these streams can change the file
descriptor number associated with the stream.)
The change will appear in man-pages-2.04.
Please close this report.
Cheers,
Michael
--
Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7
Want to help with man page maintenance? Grab the latest
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